.net - 在 Mvc asp.net 中获取选中的复选框值

Question

我在列表中显示了复选框，我想访问是否选中了哪个复选框，并想调用 Controller 操作，我从下拉列表中选择选项

<div id="pnlSent" style="display: none">
            <%= Html.DropDownList("select","msgtype") %>
            <% foreach (Usp_GetUserMessagesResult w in (List<Usp_GetUserMessagesResult>)ViewData["UListM"])
               { %>
                <li>
            <div class="question-info">

                <input id="Checkbox1" type="checkbox" onclick="function() { alert("df") ; } "  />

                <div class="views count"><span></span></div>
                <div class="question">
                    <div class="meta">Subject:  <%= w.Subject %></div>
                    <div class="meta">To: <%= w.Username  %></div>
                    <h3 class="title"><%= Html.Encode(w.Mesg)%></h3>
                </div>
            </div>
        </li>
            <% } %>

    </div>

Answer 1

在 asp.net-MVC 中，您应该以表单形式在 Controller 端访问您希望能够访问的信息，我注意到您没有在复选框中添加 ID，我的是动态绑定(bind)的，我正在使用asp.net-mvc 附带的 HTML 助手:

   <% using(Html.BeginForm("Retrieve", "Home")) %>//Retrieve is the name of the action while Home is the name of the controller
   <% { %>
        <%foreach (var app in newApps)              { %>  
      <tr> 
           <td><%=Html.CheckBox(""+app.ApplicationId )%></td>      

       </tr>  
    <%} %>
   <input type"submit"/>
 <% } %>

然后在 Controller 上，您可以访问如下信息:

   public ActionResult Retrieve()
   {
    //since all variables are dynamically bound you must load your DB into strings in a for loop as so:
  List<app>=newApps;
  for(int i=0; i<app.Count;i++)
  {


    var checkbox=Request.Form[""+app[i].ApplicationId];
    // the reason you check for false because the Html checkbox helper does some kind of freaky thing for value true: it makes the string read "true, false"
      if(checkbox!="false")
      {
      //etc...almost same for other parameters you want that are in thr form
      }

   }
//of course return your view
return View("Index");//this vaires by the name of your view ex: if Index.aspx
  }

该站点提供了有关在 View 中处理控件时如何检查 Controller 信息的更多详细信息:
http://quickstarts.asp.net/previews/mvc/mvc_HowToRenderFormUsingHtmlHelpers.htm